Add documentation for ``` -DPRESTO_ENABLE_REMOTE_FUNCTIONS=ON -DPRESTO_MEMORY_CHECKER_TYPE=LINUX_MEMORY_CHECKER ``` ## Expected Behavior or Use Case These options are undocumented. They should be documented. ## Presto Component, Service, or Connector Documentation. ## Context See [this comment](https://github.com/prestodb/presto/pull/25712#issuecomment-3259276734) in #25712 for context.